Estimation of ammonia nitrogen load from nonpoint sources in the Xitiao River catchment, China  

作　　者：LIANG Tao WANG Shanna CAO Hongying ZHANG Chaosheng LI Haitao LI Hengpeng SONG Wenchong CHONG Zhongyi 

机构地区：[1]Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China [2]Department of Geography, National University of Ireland, Galway, Ireland [3]Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China

出　　处：《Journal of Environmental Sciences》2008年第10期1195-1201,共7页环境科学学报（英文版）

基　　金：the National Key BasiResearch Project of China (No. G2002CB410807);the National Natural Science Foundation of China (No40571146)

摘　　要：Ammonia nitrogen (NH4+-N) is one of the three main forms of total nitrogen (TN). Most studies have estimated the load of TN from nonpoint sources instead of one specific form. The relationship between land use and concentrations of NH4+-N in runoff was analyzed using the hydraulic analysis functions of a Geographic Information Systems (GIS), and the annual loads of NH4+-N in the Xitiao River catchment were estimated according to model results. The results suggested that the calculated annual loads of NH4+-N...Ammonia nitrogen (NH4+-N) is one of the three main forms of total nitrogen (TN). Most studies have estimated the load of TN from nonpoint sources instead of one specific form. The relationship between land use and concentrations of NH4+-N in runoff was analyzed using the hydraulic analysis functions of a Geographic Information Systems (GIS), and the annual loads of NH4+-N in the Xitiao River catchment were estimated according to model results. The results suggested that the calculated annual loads of NH4+-N...

关 键 词：nonpoint source pollution NH4+-N Geographic Information systems （GIS） output rate LOAD 

分 类 号：X52[环境科学与工程—环境工程]